Adding inlay hints in the VS Code extension.

[lahodaj]

Adding ability to show the inline hints (using "inlayHints" of the LSP), showing the same hints as for NetBeans. Enabled by default, but can be adjusted either in global settings (Editor/Inlay Hints), or individual Java-specific capabilities can be enabled/disabled in the extension settings.

It looks like this:

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^Add meaningful description above

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[jtulach]

From end user perspective, the solution is really great:

it will make it way easier for me to work with Enso code base.

[jtulach]

Btw. Metals - the VSCode support for Scala is using Italics to render the additional inline hints: